Sparker.



G. A. WEIDELY.

SPARKER.

APPLICATION FILED mum, 190a.

Patented July 20, 1909.

2 SHEETS-SHEET 1.

G. A. WEIDELY.

SPARKER.

APPLICATION FILED JAN. 2, 190a.

2 sums-511mm z.

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witnesses %M( a fig/M UNITED STATES GEORGE A. WEIDELY, OF INDIANAPOLIS, INDIANA, ASSIGNOR OF ONE-BALI T HAROLD O.

PATENT OFFICE.

SMITH, OF INDIANAPOLIS, INDIANA.

SPARKER.

Specification of Letters Patent. Application filed January 2, 1908. Serial No. 409,037.

Patented July 20, 1909.

State of Indiana, have invented certain new and useful Improvements in Sparkers, of

which the following is a specification.

'Ihe'object of my invention is to produce I an improved sparking mechanism for internal combustion engines, the structure being so designed as to produce a sudden and positive separation of the sparking terminals as wellas compensating for any wear, and also being such as to permit ready removal-for inspection.

. The accompanying drawings illustrate my invention:

Figure 1 is a plan of a pair of my improved spark plugs; Fi .2 an axial section; Fig. 3 a detail section 0 the arm, and Fig. 4 a plan of said arm together with the cooperating stationary terminal and an operating cam.

In the drawings, 10 indicates the main body of the plug, said body being circular in cross section and provided at its inner end with an ensmalled portion 11 so as to form a tapered shoulder 12 adapted to rest upon a correspondingly formed shoulder 13 in the opening leading to the combustion chamber 14 in the en ine, so that, when a plug is slipped into 12 held tightly upon sioulder 13, a gas-tight union will be formed. The plug 10 is held in position by means of an arm or bar 15 slipped over a threaded stud 16 and held down tightly by means of a nut 17 Where an englne is provided with a pair of adjacent cylinders, as in the form shown in the drawings, this arrangement is exceedingly convenientbecause the arm 15 may be so.

proportioned as to engage the two plugs 10 and hold them both in place. If, for any reason, inspection of the inner end of the plug is desired, it is a very simple matter'to remove nut 17, whereupon arm 15 may be withdrawn and the plug 10 readily picked out without the need of a special tool or a H large wrench.

' 5 07 Formed through plug 10 is an opening 20 whiehis tapered outwardly at both ends in order to receive tapered insulating bushings 21, 21 which are bored to receive the main body or shank 22 of the stationary spark 55 plug 23. Shank 22 is provided at its inner ace and its shoulder end with a flange 24: adapted'to engage the inner busl1ing21 and the outer end'of the shank 22 is threaded and provided with pair of nuts 25 and. a washer 26, the arran eme'nt bein such that;;one wire 27 oft 1e sparking circuit may be readily attached to the shank 22 and, by tightening nuts25, the two bushings 21, 21 may be simultaneously forced into the oppositely tapered ends of the openin 20 andthu's form a gas-ti ht 'mounting for the stationary plug 21. PIug 10 is also provided with a'bore 30 in which is journaled the spindle 31 of a. swinging terminal 32 which, at its end, is provided snugly in place in its seat by means of a spring 37.

In order to Near its outer end spindle 31 is'tapered at 41 and'mounted on its ta ered portion is a correspondingly bored hu 42 of an arm 43,

with a face adapted to contact with a face.

form a support for the spring I provide head 10 with the tubular boss 40.

and a nut 44 on the threaded end45 of spindle 31 serves to clamp said hub in desired angular position on spindle 31. Arm 43 is provided with a pair of separated fingers or abutments 46 46 between which' projects an arm- 48 which is somewhat g arrower than the distance between the fin ers and is iournaled at its inner end upon hub 42. A ight spring 50 is introduced between these two arms to normally hold arm d8 of the fingers 46. Arm 48 is against 'one provided with ahead 51gadapted to be engaged by an operating cam 52, and in order to use the structure in the two-cylinder construction, (such as that shown in Fi s. 1 and 2), withoutthe necessity ofmaking rights and lefts, while at the same time making the engagement of the two arms with separate cams, as shown in Fi 2, I make the arm {18 symmetrical with relation to its hub any '55 48, but oiiset the head 51 to'one side of the general line of arm 48 and at the outer endof said arm provide an eye 53 which is in the gen eral line of the arm, as shownin Fi s. 2 and 3. -By this arrangement it will ie seen that the arm 48 of the rorit spindle 31 1(I iga2) can be arranged so hat its head 51 upon both' arms to swing will lie below the general plane of the arm, while the arm 48 on the rear spindle. 31 (the left hand one in Fig. 1) can be reversed so that its head 51 Will lie above the general plane of its arm. The two heads 51 will therefore lie in differentplanes and be" in position to engage different cams 52, 52 both of the cams being carried by the single cam shaft 60. The eyes 53, however, will both lie in the same plane, and consequently may be connected by a spring 61 which operates them, when released at different times by their cams, so as to withdrawn the contact faces from the corresponding stationary contact faces 34.

The operation is as follows: Heads 51 are broughtinto engagement with their corresponding cams 52 by the spring 61, and each arm 43 is' secured upon its spindle 31 in such position that when its head 51 is in engagementwith the largest portion of its 1 rain, the contact face 33 of its arm will be in engagement with the cooperating stationary contact face 3 1, and spring'5U will be compressed to about its full extent so that arm 48 will be in engagement with that linger 46 which lies back of the spring 50.

Referring now to the right hand end of Fig. 1, it will be seen that, as the engine operates and the cam shaft rotates, shoulder- .32 of the cam 52 will be drawn past head- 51 of arm 48, and this arm during its first movement will move independently of the arm 32, and consequently, when it engages finger 46 of arm 43, it will deliver a blow to said arm which will serve to suddenly and sharply withdraw the contact face 33 from contact face 34, and thus insure a brillantand fat spark. As the contact faces and 31 wear and as the cam 52 and head 51 wear, any tendency to slackness will be compensated by the spring 50 although this Wear should not be permitted to amount to enough to take up the entire slack between the arm 18 and the forward linger 46 of its arm 43, for if this takes place the arm 48 is no longer capable of delivering the desirable separating blow to the swinging contactarm 32.

'l-l aving thus fully described my said i11- ventiiin, what I claim as new, and desire to secure by Letters Patent, is 4 In a sparker, a swinging terminal, a cooperating terminal, a rock shaft carrying said swinging terminal and having a threaded outer end flanked by a taper d portion, an arm sleeved on the said tapered portion and fitting the same, a nut for clamping said arm in any desired angular position on said tapered portion, a second arm sleeved upon the first mentioned arm, an abutment carried by one of said arms and adapted to engage the other arm, and a spring arranged between said arms, for the purpose set forth.

in witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana, thisthirtieth day of December, A'. I). one thousand nine hundred and seven.

GEORGEA. Y EIDELY. [n lVitnesses 1 Harem) (i). SMITH, An'rirun M. Moon, 

